From left, Reps. Paul Tonko, James E. Clyburn, John Lewis, Joseph Crowley and Nancy Pelosi sing "We Shall Overcome" with demonstrators on the East Front of the Capitol after the House Democrats' sit-in ended Thursday. (Tom Williams/CQ Roll Call)

"Emboldened."

That was how House Minority Leader Nancy Pelosi described the mood as her Democratic colleagues staged a sit-in Wednesday on the House floor to call for a vote on gun control. Democrats left the chamber Thursday, nearly 26 hours later, still showing signs of that boldness.